I did not mix up any theorists. Hobbes wrote about the social contract ~100 years before Rousseau did and 30 years before Locke. For all intents and purposes he invented the concept.
https://en.wikipedia.org/wiki/Social_contract#Thomas_Hobbes....
https://en.wikipedia.org/wiki/Social_contract#Thomas_Hobbes....
Still, I'm glad you read the wikipedia page: B+ for effort.